{"id":1300,"date":"2015-10-19T14:16:11","date_gmt":"2015-10-19T12:16:11","guid":{"rendered":"http:\/\/tinusaur.org\/?page_id=1300"},"modified":"2022-01-01T23:04:05","modified_gmt":"2022-01-01T21:04:05","slug":"usitwix","status":"publish","type":"page","link":"https:\/\/tinusaur.org\/projects\/usitwix\/","title":{"rendered":"USITWIX"},"content":{"rendered":"

USITWIX<\/strong> is a library that uses the built into ATtiny85<\/a>\/Tinusaur<\/a>\u00a0USI unit to implement Atmel<\/a> TWI<\/strong> (Two Wire Interface)\u00a0which is compatible with Philips\u00a0I\u00b2C<\/a>\u00a0interface.<\/p>\n

The primary source for this\u00a0work is the Atmel application note\u00a0AVR312: Using the USI module as a I2C slave<\/a>\u00a0that explains how to use the\u00a0\u00a0built-in USI unit as I2C slave.<\/p>\n

\"TWI<\/a>
Diagram from AVR312: Using the USI module as a I2C slave<\/figcaption><\/figure>\n

The source code is available at\u00a0https:\/\/bitbucket.org\/tinusaur\/usitwix<\/a>.<\/p>\n

User the USITWIX Library<\/h1>\n

TBD<\/p>\n

References<\/h1>\n

Here are some references to sources that were\u00a0used while developing\u00a0this library.<\/p>\n

AVR312: Using the USI module as a I2C slave<\/strong>
\nhttp:\/\/www.atmel.com\/Images\/doc2560.pdf<\/a>
\nC-code driver for TWI slave, with transmit and receive buffers;\u00a0Compatible with I2C protocol;\u00a0Interrupt driven, detection and transmission\/reception;\u00a0Wake up from all sleep mode, including Power Down.<\/em><\/p>\n

TINY USI Interface in I2C mode and the AVR312 Appnote <\/strong>
\nhttp:\/\/www.aca-vogel.de\/TINYUSII2C_AVR312\/APN_TINYUSI_I2C.html<\/a>
\nWhat\u2019s wrong with the AVR Appnote?<\/em><\/p>\n

ATTiny USI I2C Introduction \u2013 A powerful, fast, and convenient communication interface for your ATTiny projects!<\/strong>
\nhttp:\/\/www.instructables.com\/id\/ATTiny-USI-I2C-The-detailed-in-depth-and-infor\/<\/a>
\nI2C, it\u2019s a standard that\u2019s been around for around 20 years and has found uses in nearly every corner of the electronics universe. It\u2019s an incredibly useful technology for us microcontroller hobbyists but can seem daunting for new users. This tutorial will solve that problem, first by reviewing what I2C is and how it works, then by going in-depth on how to implement I2C in Atmel\u2019s ATTiny USI (Universal Serial Interface) hardware.<\/em><\/p>\n

I2C Bus for ATtiny and ATmega<\/strong>
\nhttp:\/\/www.instructables.com\/id\/I2C_Bus_for_ATtiny_and_ATmega\/<\/a>
\nThis two wire interface is formally known as the Inter-Integrated Circuit bus, or just the I2C bus and was invented by NXP when it was still Philips Semiconductors. If you\u2019re reading this Instructable then you\u2019ve probably heard of the I2C bus and may even have used it on a PIC or other microcontroller. While conceptually very simple, and supported by hardware resources on the AVRs, software drivers are still necessary to use the I2C bus. Atmel provides Application Notes (see the Resources later in this Instructable), but these are incomplete and don\u2019t show any examples beyond communicating with another AVR device.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":"

USITWIX is a library that uses the built into ATtiny85\/Tinusaur\u00a0USI unit to implement Atmel TWI (Two Wire Interface)\u00a0which is compatible with Philips\u00a0I\u00b2C\u00a0interface. The primary source for this\u00a0work is the Atmel application note\u00a0AVR312: Using the USI module as a I2C slave\u00a0that explains how to use the\u00a0\u00a0built-in USI unit as I2C slave. The source code is available … Read more<\/a><\/p>\n","protected":false},"author":54,"featured_media":1325,"parent":654,"menu_order":16,"comment_status":"open","ping_status":"closed","template":"","meta":{"footnotes":""},"yoast_head":"\nUSITWIX - The Tinusaur Project<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/tinusaur.org\/projects\/usitwix\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"USITWIX - The Tinusaur Project\" \/>\n<meta property=\"og:description\" content=\"USITWIX is a library that uses the built into ATtiny85\/Tinusaur\u00a0USI unit to implement Atmel TWI (Two Wire Interface)\u00a0which is compatible with Philips\u00a0I\u00b2C\u00a0interface. The primary source for this\u00a0work is the Atmel application note\u00a0AVR312: Using the USI module as a I2C slave\u00a0that explains how to use the\u00a0\u00a0built-in USI unit as I2C slave. The source code is available ... 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